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The heat is on for the semifinals as contestants craft a pair of Venetian glass pieces: a quick-blow goblet and a highly detailed vessel.

Passions flare as the judges task the five remaining contestants with creating pieces that pay tribute to causes they care deeply about.

The glassblowers take cues from natural wonders with vivid, gravity-defying installations while working in teams.

Inspired by kids' imaginative illustrations, the glassblowers prepare one-of-a-kind pieces including a top hat-wearing snake and a flame-throwing robot.

The glassblowers put their presentation skills to the test by creating two pieces — one hanging and one sitting on a pedestal — that work cohesively.

Ten glassblowers hit the hot shop to create pieces that show off their signature style. But when scale is a factor, will they rise to the occasion?

An angry vacuum, a reclusive imp and other colorful creatures come to life as the contestants create their own original cartoon characters.

The artists play with scale, color and texture as they bring to life botanical-themed sculptures that transcend gift shop kitsch.

The hot shop meets the big top in a circus-themed challenge filled with whimsical creatures, from a bearded dragon lady to a dapper walrus.

Lollipops, gummy bears and hard candies decorate the showroom as the artists make colorful, supersized confections for a tricky treat-based challenge.

The five remaining competitors must design an exquisite perfume bottle with a sculpted stopper and render it in two sizes.

The judges issue a surprisingly tricky challenge: create a drinking glass and decanter that are both visually appealing and functional.

The seven glassblowers take on the Seven Deadly Sins, yielding a menacingly lustful rose, a vibrant ode to gluttony and a piece that's green with envy.

To celebrate the Year of Glass, the contestants create pieces inspired by groundbreaking glass inventions, from Galileo's telescope to smartphones.

Each artist designs a set of six glasses for a different beverage, including fancy flutes for Champagne and curvaceous chalices for Belgian ale. Cheers!

In the fiery finale, the last two standing look to be the best in glass by designing an immersive installation. Will their pieces blow the judges away?

Ten new glassblowers impress the judges — including the Season 1 champion — with pieces that tell the story of their evolution as artists.

"Queer Eye" expert Bobby Berk stops by the shop with the latests challenge: create glass art centerpieces for a dining room table.

In an intense eight-hour challenge, the final two artists create two very different installations. Both wow the judges, but only one can be the winner.

Go big or go home! As their numbers dwindle, the artists turn tiny objects into supersized sculptures — including an olive, a thimble and a pushpin.

Challenged to reflect on hurdles they've overcome in their pasts, the contestants forge powerful pieces that push their skills to the limit.

Channeling their favorite foods, the contestants serve up exploding sushi in a whimsical bento box, ornate glass stands for tacos, and more.

When the contestants design glass robots fit for the future, smashed sculptures and outsize ambitions threaten to crush their chances.

Inspired by emotionally meaningful photographs, the artists craft poignant glass pieces that provide illuminating snapshots of who they are.